Measurement of Water Content and Volume Change of Hardened Cement Paste by Neutron Imaging

2014 Fiscal Year Final Research Report

• Project/Area Number: 23560546
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Ibaraki University
• Principal Investigator: NUMAO Tatsuya 茨城大学, 工学部, 教授 (90164649)
• Co-Investigator(Kenkyū-buntansha): KAWABATA Yuji 京都大学, 原子炉実験所, 教授 (00224840) ; HARADA Takao 茨城大学, 工学部, 准教授 (00241745)
• Research Collaborator: FUNAKAWA Isao 茨城大学, 大学院・理工学研究科
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 中性子ラジオグラフィ / セメント硬化体 / 含有水量 / 体積変化

Outline of Final Research Achievements

Hardened cement paste shrinks with drying or swells with wetting. This repeated shrinking and swelling of the paste affects the paste’s long-term durability. Therefore, it is important to characterize the moisture distribution in the hardened cement paste and the deformation associated with moisture movement.
In this study, the experiments were carried out to measure the water content in hardened cement paste by using neutron radiography of KUR. The authors developed a correction formula and adjusted the formula for each test result to identify the moisture volume by using some parameters, and discuss the relationship between water content and volume change of Hardened Cement Paste.

Free Research Field

コンクリート工学